Examples: Apple: Consolidated example_apple_metal to reduce class and file count (#1873, #3543)

docs/CHANGELOG.txt

@@ -62,6 +62,7 @@ Other Changes:
 - Backends: OpenGL3: Use glGetString(GL_VERSION) query instead of glGetIntegerv(GL_MAJOR_VERSION, ...) 
   when the later returns zero (e.g. Desktop GL 2.x). (#3530) [@xndcn]
 - Backends: OpenGL3: Backup and restore GL_PRIMITIVE_RESTART state. (#3544) [@Xipiryon]
+- Examples: Apple+Metal: Consolidated/simplified to get closer to other examples. (#3543) [@warrenm]
 - Docs: Split examples/README.txt into docs/BACKENDS.md and docs/EXAMPLES.md improved them.
 - Docs: Consistently renamed all occurences of "binding" and "back-end" to "backend" in comments and docs.
 

examples/example_apple_metal/Shared/AppDelegate.h

@@ -1,18 +0,0 @@
-#import <TargetConditionals.h>
-
-#if TARGET_OS_IPHONE
-
-#import <UIKit/UIKit.h>
-
-@interface AppDelegate : UIResponder <UIApplicationDelegate>
-@property (strong, nonatomic) UIWindow *window;
-@end
-
-#else
-
-#import <Cocoa/Cocoa.h>
-
-@interface AppDelegate : NSObject <NSApplicationDelegate>
-@end
-
-#endif

examples/example_apple_metal/Shared/AppDelegate.m

@@ -1,11 +0,0 @@
-#import "AppDelegate.h"
-
-@implementation AppDelegate
-
-#if TARGET_OS_OSX
-- (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)sender {
-    return YES;
-}
-#endif
-
-@end

examples/example_apple_metal/Shared/Renderer.h

@@ -1,8 +0,0 @@
-#import <MetalKit/MetalKit.h>
-
-@interface Renderer : NSObject <MTKViewDelegate>
-
--(nonnull instancetype)initWithView:(nonnull MTKView *)view;
-
-@end
-

examples/example_apple_metal/Shared/Renderer.mm

@@ -1,154 +0,0 @@
-#import "Renderer.h"
-#import <Metal/Metal.h>
-
-#include "imgui.h"
-#include "imgui_impl_metal.h"
-
-#if TARGET_OS_OSX
-#include "imgui_impl_osx.h"
-#endif
-
-@interface Renderer ()
-@property (nonatomic, strong) id <MTLDevice> device;
-@property (nonatomic, strong) id <MTLCommandQueue> commandQueue;
-@end
-
-@implementation Renderer
-
--(nonnull instancetype)initWithView:(nonnull MTKView*)view;
-{
-    self = [super init];
-    if(self)
-    {
-        _device = view.device;
-        _commandQueue = [_device newCommandQueue];
-
-        // Setup Dear ImGui context
-        // FIXME: This example doesn't have proper cleanup...
-        IMGUI_CHECKVERSION();
-        ImGui::CreateContext();
-        ImGuiIO& io = ImGui::GetIO(); (void)io;
-        //io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;     // Enable Keyboard Controls
-        //io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;      // Enable Gamepad Controls
-
-        // Setup Dear ImGui style
-        ImGui::StyleColorsDark();
-        //ImGui::StyleColorsClassic();
-
-        // Setup Renderer backend
-        ImGui_ImplMetal_Init(_device);
-
-        // Load Fonts
-        // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
-        // - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple.
-        // - If the file cannot be loaded, the function will return NULL. Please handle those errors in your application (e.g. use an assertion, or display an error and quit).
-        // - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call.
-        // - Read 'docs/FONTS.txt' for more instructions and details.
-        // - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !
-        //io.Fonts->AddFontDefault();
-        //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 16.0f);
-        //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f);
-        //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f);
-        //io.Fonts->AddFontFromFileTTF("../../misc/fonts/ProggyTiny.ttf", 10.0f);
-        //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
-        //IM_ASSERT(font != NULL);
-    }
-
-    return self;
-}
-
-- (void)drawInMTKView:(MTKView*)view
-{
-    ImGuiIO &io = ImGui::GetIO();
-    io.DisplaySize.x = view.bounds.size.width;
-    io.DisplaySize.y = view.bounds.size.height;
-
-#if TARGET_OS_OSX
-    CGFloat framebufferScale = view.window.screen.backingScaleFactor ?: NSScreen.mainScreen.backingScaleFactor;
-#else
-    CGFloat framebufferScale = view.window.screen.scale ?: UIScreen.mainScreen.scale;
-#endif
-    io.DisplayFramebufferScale = ImVec2(framebufferScale, framebufferScale);
-
-    io.DeltaTime = 1 / float(view.preferredFramesPerSecond ?: 60);
-
-    id<MTLCommandBuffer> commandBuffer = [self.commandQueue commandBuffer];
-
-    // Our state (make them static = more or less global) as a convenience to keep the example terse.
-    static bool show_demo_window = true;
-    static bool show_another_window = false;
-    static float clear_color[4] = { 0.28f, 0.36f, 0.5f, 1.0f };
-
-    MTLRenderPassDescriptor* renderPassDescriptor = view.currentRenderPassDescriptor;
-    if (renderPassDescriptor != nil)
-    {
-        renderPassDescriptor.colorAttachments[0].clearColor = MTLClearColorMake(clear_color[0], clear_color[1], clear_color[2], clear_color[3]);
-
-        // Here, you could do additional rendering work, including other passes as necessary.
-
-        id <MTLRenderCommandEncoder> renderEncoder = [commandBuffer renderCommandEncoderWithDescriptor:renderPassDescriptor];
-        [renderEncoder pushDebugGroup:@"ImGui demo"];
-
-        // Start the Dear ImGui frame
-        ImGui_ImplMetal_NewFrame(renderPassDescriptor);
-#if TARGET_OS_OSX
-        ImGui_ImplOSX_NewFrame(view);
-#endif
-        ImGui::NewFrame();
-
-        // 1. Show the big demo window (Most of the sample code is in ImGui::ShowDemoWindow()! You can browse its code to learn more about Dear ImGui!).
-        if (show_demo_window)
-            ImGui::ShowDemoWindow(&show_demo_window);
-
-        // 2. Show a simple window that we create ourselves. We use a Begin/End pair to created a named window.
-        {
-            static float f = 0.0f;
-            static int counter = 0;
-
-            ImGui::Begin("Hello, world!");                          // Create a window called "Hello, world!" and append into it.
-
-            ImGui::Text("This is some useful text.");               // Display some text (you can use a format strings too)
-            ImGui::Checkbox("Demo Window", &show_demo_window);      // Edit bools storing our window open/close state
-            ImGui::Checkbox("Another Window", &show_another_window);
-
-            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float using a slider from 0.0f to 1.0f
-            ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color
-
-            if (ImGui::Button("Button"))                            // Buttons return true when clicked (most widgets return true when edited/activated)
-                counter++;
-            ImGui::SameLine();
-            ImGui::Text("counter = %d", counter);
-
-            ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
-            ImGui::End();
-        }
-
-        // 3. Show another simple window.
-        if (show_another_window)
-        {
-            ImGui::Begin("Another Window", &show_another_window);   // Pass a pointer to our bool variable (the window will have a closing button that will clear the bool when clicked)
-            ImGui::Text("Hello from another window!");
-            if (ImGui::Button("Close Me"))
-                show_another_window = false;
-            ImGui::End();
-        }
-
-        // Rendering
-        ImGui::Render();
-        ImDrawData* drawData = ImGui::GetDrawData();
-        ImGui_ImplMetal_RenderDrawData(drawData, commandBuffer, renderEncoder);
-
-        [renderEncoder popDebugGroup];
-        [renderEncoder endEncoding];
-
-        [commandBuffer presentDrawable:view.currentDrawable];
-    }
-
-    [commandBuffer commit];
-}
-
-- (void)mtkView:(MTKView*)view drawableSizeWillChange:(CGSize)size
-{
-}
-
-@end

examples/example_apple_metal/Shared/ViewController.h

@@ -1,19 +0,0 @@
-#import <Metal/Metal.h>
-#import <MetalKit/MetalKit.h>
-#import "Renderer.h"
-
-#if TARGET_OS_IPHONE
-
-#import <UIKit/UIKit.h>
-
-@interface ViewController : UIViewController
-@end
-
-#else
-
-#import <Cocoa/Cocoa.h>
-
-@interface ViewController : NSViewController
-@end
-
-#endif

examples/example_apple_metal/Shared/ViewController.mm

@@ -1,153 +0,0 @@
-#import "ViewController.h"
-#import "Renderer.h"
-#include "imgui.h"
-
-#if TARGET_OS_OSX
-#include "imgui_impl_osx.h"
-#endif
-
-@interface ViewController ()
-@property (nonatomic, readonly) MTKView *mtkView;
-@property (nonatomic, strong) Renderer *renderer;
-@end
-
-@implementation ViewController
-
-- (MTKView *)mtkView {
-    return (MTKView *)self.view;
-}
-
-- (void)viewDidLoad
-{
-    [super viewDidLoad];
-
-    self.mtkView.device = MTLCreateSystemDefaultDevice();
-
-    if (!self.mtkView.device) {
-        NSLog(@"Metal is not supported");
-        abort();
-    }
-
-    self.renderer = [[Renderer alloc] initWithView:self.mtkView];
-
-    [self.renderer mtkView:self.mtkView drawableSizeWillChange:self.mtkView.bounds.size];
-
-    self.mtkView.delegate = self.renderer;
-
-#if TARGET_OS_OSX
-    // Add a tracking area in order to receive mouse events whenever the mouse is within the bounds of our view
-    NSTrackingArea *trackingArea = [[NSTrackingArea alloc] initWithRect:NSZeroRect
-                                                                options:NSTrackingMouseMoved | NSTrackingInVisibleRect | NSTrackingActiveAlways
-                                                                  owner:self
-                                                               userInfo:nil];
-    [self.view addTrackingArea:trackingArea];
-
-    // If we want to receive key events, we either need to be in the responder chain of the key view,
-    // or else we can install a local monitor. The consequence of this heavy-handed approach is that
-    // we receive events for all controls, not just Dear ImGui widgets. If we had native controls in our
-    // window, we'd want to be much more careful than just ingesting the complete event stream, though we
-    // do make an effort to be good citizens by passing along events when Dear ImGui doesn't want to capture.
-    NSEventMask eventMask = NSEventMaskKeyDown | NSEventMaskKeyUp | NSEventMaskFlagsChanged | NSEventTypeScrollWheel;
-    [NSEvent addLocalMonitorForEventsMatchingMask:eventMask handler:^NSEvent * _Nullable(NSEvent *event) {
-        BOOL wantsCapture = ImGui_ImplOSX_HandleEvent(event, self.view);
-        if (event.type == NSEventTypeKeyDown && wantsCapture) {
-            return nil;
-        } else {
-            return event;
-        }
-
-    }];
-
-    ImGui_ImplOSX_Init();
-#endif
-}
-
-#if TARGET_OS_OSX
-
-- (void)mouseMoved:(NSEvent *)event {
-    ImGui_ImplOSX_HandleEvent(event, self.view);
-}
-
-- (void)mouseDown:(NSEvent *)event {
-    ImGui_ImplOSX_HandleEvent(event, self.view);
-}
-
-- (void)rightMouseDown:(NSEvent *)event {
-    ImGui_ImplOSX_HandleEvent(event, self.view);
-}
-
-- (void)otherMouseDown:(NSEvent *)event {
-    ImGui_ImplOSX_HandleEvent(event, self.view);
-}
-
-- (void)mouseUp:(NSEvent *)event {
-    ImGui_ImplOSX_HandleEvent(event, self.view);
-}
-
-- (void)rightMouseUp:(NSEvent *)event {
-    ImGui_ImplOSX_HandleEvent(event, self.view);
-}
-
-- (void)otherMouseUp:(NSEvent *)event {
-    ImGui_ImplOSX_HandleEvent(event, self.view);
-}
-
-- (void)mouseDragged:(NSEvent *)event {
-    ImGui_ImplOSX_HandleEvent(event, self.view);
-}
-
-- (void)rightMouseDragged:(NSEvent *)event {
-    ImGui_ImplOSX_HandleEvent(event, self.view);
-}
-
-- (void)otherMouseDragged:(NSEvent *)event {
-    ImGui_ImplOSX_HandleEvent(event, self.view);
-}
-
-- (void)scrollWheel:(NSEvent *)event {
-    ImGui_ImplOSX_HandleEvent(event, self.view);
-}
-
-#elif TARGET_OS_IOS
-
-// This touch mapping is super cheesy/hacky. We treat any touch on the screen
-// as if it were a depressed left mouse button, and we don't bother handling
-// multitouch correctly at all. This causes the "cursor" to behave very erratically
-// when there are multiple active touches. But for demo purposes, single-touch
-// interaction actually works surprisingly well.
-- (void)updateIOWithTouchEvent:(UIEvent *)event {
-    UITouch *anyTouch = event.allTouches.anyObject;
-    CGPoint touchLocation = [anyTouch locationInView:self.view];
-    ImGuiIO &io = ImGui::GetIO();
-    io.MousePos = ImVec2(touchLocation.x, touchLocation.y);
-
-    BOOL hasActiveTouch = NO;
-    for (UITouch *touch in event.allTouches) {
-        if (touch.phase != UITouchPhaseEnded && touch.phase != UITouchPhaseCancelled) {
-            hasActiveTouch = YES;
-            break;
-        }
-    }
-    io.MouseDown[0] = hasActiveTouch;
-}
-
-- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
-    [self updateIOWithTouchEvent:event];
-}
-
-- (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
-    [self updateIOWithTouchEvent:event];
-}
-
-- (void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
-    [self updateIOWithTouchEvent:event];
-}
-
-- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
-    [self updateIOWithTouchEvent:event];
-}
-
-#endif
-
-@end
-

examples/example_apple_metal/Shared/main.m

@@ -1,22 +0,0 @@
-#import <TargetConditionals.h>
-
-#if TARGET_OS_IPHONE
-
-#import <UIKit/UIKit.h>
-#import "AppDelegate.h"
-
-int main(int argc, char * argv[]) {
-    @autoreleasepool {
-        return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
-    }
-}
-
-#else
-
-#import <Cocoa/Cocoa.h>
-
-int main(int argc, const char * argv[]) {
-    return NSApplicationMain(argc, argv);
-}
-
-#endif

examples/example_apple_metal/example_apple_metal.xcodeproj/project.pbxproj

@@ -9,27 +9,19 @@
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-		8307E7CC20E9F9C900473790 /* ViewController.mm in Sources */ = {isa = PBXBuildFile; fileRef = 8307E7CB20E9F9C900473790 /* ViewController.mm */; };
+		8309BD8F253CCAAA0045E2A1 /* UIKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 8309BD8E253CCAAA0045E2A1 /* UIKit.framework */; };
-		8307E7CF20E9F9C900473790 /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 8307E7CD20E9F9C900473790 /* Main.storyboard */; };
+		8309BDA5253CCC070045E2A1 /* main.mm in Sources */ = {isa = PBXBuildFile; fileRef = 8309BDA0253CCBC10045E2A1 /* main.mm */; };
-		8307E7DE20E9F9C900473790 /* AppDelegate.m in Sources */ = {isa = PBXBuildFile; fileRef = 8307E7DD20E9F9C900473790 /* AppDelegate.m */; };
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-		8307E7E720E9F9C900473790 /* main.m in Sources */ = {isa = PBXBuildFile; fileRef = 8307E7E620E9F9C900473790 /* main.m */; };
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-		8307E7E820E9F9C900473790 /* Renderer.mm in Sources */ = {isa = PBXBuildFile; fileRef = 8307E7BC20E9F9C700473790 /* Renderer.mm */; };
+		8309BDBF253CCCB60045E2A1 /* imgui_impl_osx.mm in Sources */ = {isa = PBXBuildFile; fileRef = 8309BDB6253CCC9D0045E2A1 /* imgui_impl_osx.mm */; };
-		8307E7E920E9F9C900473790 /* Renderer.mm in Sources */ = {isa = PBXBuildFile; fileRef = 8307E7BC20E9F9C700473790 /* Renderer.mm */; };
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 		83BBE9EC20EB471700295997 /* MetalKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 83BBE9EA20EB471700295997 /* MetalKit.framework */; };
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@@ -41,31 +33,23 @@
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-		8307E7DD20E9F9C900473790 /* AppDelegate.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = AppDelegate.m; sourceTree = "<group>"; };
+		8309BDA0253CCBC10045E2A1 /* main.mm */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.objcpp; path = main.mm; sourceTree = "<group>"; };
-		8307E7E320E9F9C900473790 /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/Main.storyboard; sourceTree = "<group>"; };
+		8309BDB5253CCC9D0045E2A1 /* imgui_impl_metal.mm */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.objcpp; name = imgui_impl_metal.mm; path = ../../backends/imgui_impl_metal.mm; sourceTree = "<group>"; };
-		8307E7E520E9F9C900473790 /* Info-macOS.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = "Info-macOS.plist"; sourceTree = "<group>"; };
+		8309BDB6253CCC9D0045E2A1 /* imgui_impl_osx.mm */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.objcpp; name = imgui_impl_osx.mm; path = ../../backends/imgui_impl_osx.mm; sourceTree = "<group>"; };
-		8307E7E620E9F9C900473790 /* main.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = main.m; sourceTree = "<group>"; };
+		8309BDC5253CCCFE0045E2A1 /* AppKit.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = AppKit.framework; path = System/Library/Frameworks/AppKit.framework; sourceTree = SDKROOT; };
-		836D2A2C20EE208D0098E909 /* imgui_impl_osx.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = imgui_impl_osx.h; path = ../../../backends/imgui_impl_osx.h; sourceTree = "<group>"; };
+		8309BDF7253CDAAE0045E2A1 /* LaunchScreen.storyboard */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; path = LaunchScreen.storyboard; sourceTree = "<group>"; };
-		836D2A2D20EE208E0098E909 /* imgui_impl_osx.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; name = imgui_impl_osx.mm; path = ../../../backends/imgui_impl_osx.mm; sourceTree = "<group>"; };
+		8309BDF8253CDAAE0045E2A1 /* Info-iOS.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = "Info-iOS.plist"; sourceTree = "<group>"; };
-		836D2A2F20EE4A180098E909 /* Default-568h@2x.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; path = "Default-568h@2x.png"; sourceTree = "<group>"; };
+		8309BDFA253CDAAE0045E2A1 /* MainMenu.storyboard */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; path = MainMenu.storyboard; sourceTree = "<group>"; };
-		836D2A3120EE4A900098E909 /* Launch Screen.storyboard */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; path = "Launch Screen.storyboard"; sourceTree = "<group>"; };
+		8309BDFB253CDAAE0045E2A1 /* Info-macOS.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = "Info-macOS.plist"; sourceTree = "<group>"; };
 		83BBE9E420EB46B900295997 /* Metal.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = Metal.framework; path = Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS11.4.sdk/System/Library/Frameworks/Metal.framework; sourceTree = DEVELOPER_DIR; };
 		83BBE9E620EB46BD00295997 /* MetalKit.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = MetalKit.framework; path = Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS11.4.sdk/System/Library/Frameworks/MetalKit.framework; sourceTree = DEVELOPER_DIR; };
 		83BBE9E820EB46C100295997 /* ModelIO.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = ModelIO.framework; path = Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS11.4.sdk/System/Library/Frameworks/ModelIO.framework; sourceTree = DEVELOPER_DIR; };
 		83BBE9EA20EB471700295997 /* MetalKit.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = MetalKit.framework; path = System/Library/Frameworks/MetalKit.framework; sourceTree = SDKROOT; };
 		83BBE9EB20EB471700295997 /* Metal.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = Metal.framework; path = System/Library/Frameworks/Metal.framework; sourceTree = SDKROOT; };
 		83BBE9EE20EB471C00295997 /* ModelIO.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = ModelIO.framework; path = System/Library/Frameworks/ModelIO.framework; sourceTree = SDKROOT; };
-		83BBE9FC20EB54D800295997 /* imgui_impl_metal.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = imgui_impl_metal.h; path = ../../../backends/imgui_impl_metal.h; sourceTree = "<group>"; };
-		83BBE9FD20EB54D800295997 /* imgui_impl_metal.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; name = imgui_impl_metal.mm; path = ../../../backends/imgui_impl_metal.mm; sourceTree = "<group>"; };
 		83BBEA0020EB54E700295997 /* imgui.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = imgui.h; path = ../../imgui.h; sourceTree = "<group>"; };
 		83BBEA0120EB54E700295997 /* imgui_draw.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = imgui_draw.cpp; path = ../../imgui_draw.cpp; sourceTree = "<group>"; };
 		83BBEA0220EB54E700295997 /* imgui_demo.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = imgui_demo.cpp; path = ../../imgui_demo.cpp; sourceTree = "<group>"; };
@@ -78,7 +62,7 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				83BBE9E920EB46C100295997 /* ModelIO.framework in Frameworks */,
+				8309BD8F253CCAAA0045E2A1 /* UIKit.framework in Frameworks */,
 				83BBE9E720EB46BD00295997 /* MetalKit.framework in Frameworks */,
 				83BBE9E520EB46B900295997 /* Metal.framework in Frameworks */,
 			);
@@ -88,7 +72,7 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				83BBE9EF20EB471C00295997 /* ModelIO.framework in Frameworks */,
+				8309BDC6253CCCFE0045E2A1 /* AppKit.framework in Frameworks */,
 				83BBE9EC20EB471700295997 /* MetalKit.framework in Frameworks */,
 				83BBE9ED20EB471700295997 /* Metal.framework in Frameworks */,
 			);
@@ -101,32 +85,12 @@
 			isa = PBXGroup;
 			children = (
 				83BBE9F020EB544400295997 /* imgui */,
-				8307E7BA20E9F9C700473790 /* Shared */,
+				8309BD9E253CCBA70045E2A1 /* example */,
-				8307E7C620E9F9C900473790 /* iOS */,
-				8307E7DB20E9F9C900473790 /* macOS */,
 				8307E7C520E9F9C900473790 /* Products */,
 				83BBE9E320EB46B800295997 /* Frameworks */,
 			);
 			sourceTree = "<group>";
 		};
-		8307E7BA20E9F9C700473790 /* Shared */ = {
-			isa = PBXGroup;
-			children = (
-				83BBE9FC20EB54D800295997 /* imgui_impl_metal.h */,
-				83BBE9FD20EB54D800295997 /* imgui_impl_metal.mm */,
-				836D2A2C20EE208D0098E909 /* imgui_impl_osx.h */,
-				836D2A2D20EE208E0098E909 /* imgui_impl_osx.mm */,
-				8307E7DC20E9F9C900473790 /* AppDelegate.h */,
-				8307E7DD20E9F9C900473790 /* AppDelegate.m */,
-				8307E7BB20E9F9C700473790 /* Renderer.h */,
-				8307E7BC20E9F9C700473790 /* Renderer.mm */,
-				8307E7CA20E9F9C900473790 /* ViewController.h */,
-				8307E7CB20E9F9C900473790 /* ViewController.mm */,
-				8307E7E620E9F9C900473790 /* main.m */,
-			);
-			path = Shared;
-			sourceTree = "<group>";
-		};
 		8307E7C520E9F9C900473790 /* Products */ = {
 			isa = PBXGroup;
 			children = (
@@ -136,22 +100,30 @@
 			name = Products;
 			sourceTree = "<group>";
 		};
-		8307E7C620E9F9C900473790 /* iOS */ = {
+		8309BD9E253CCBA70045E2A1 /* example */ = {
 			isa = PBXGroup;
 			children = (
-				836D2A2F20EE4A180098E909 /* Default-568h@2x.png */,
+				8309BDF6253CDAAE0045E2A1 /* iOS */,
-				8307E7CD20E9F9C900473790 /* Main.storyboard */,
+				8309BDF9253CDAAE0045E2A1 /* macOS */,
-				8307E7D320E9F9C900473790 /* Info-iOS.plist */,
+				8309BDA0253CCBC10045E2A1 /* main.mm */,
-				836D2A3120EE4A900098E909 /* Launch Screen.storyboard */,
+			);
+			name = example;
+			sourceTree = "<group>";
+		};
+		8309BDF6253CDAAE0045E2A1 /* iOS */ = {
+			isa = PBXGroup;
+			children = (
+				8309BDF7253CDAAE0045E2A1 /* LaunchScreen.storyboard */,
+				8309BDF8253CDAAE0045E2A1 /* Info-iOS.plist */,
 			);
 			path = iOS;
 			sourceTree = "<group>";
 		};
-		8307E7DB20E9F9C900473790 /* macOS */ = {
+		8309BDF9253CDAAE0045E2A1 /* macOS */ = {
 			isa = PBXGroup;
 			children = (
-				8307E7E220E9F9C900473790 /* Main.storyboard */,
+				8309BDFA253CDAAE0045E2A1 /* MainMenu.storyboard */,
-				8307E7E520E9F9C900473790 /* Info-macOS.plist */,
+				8309BDFB253CDAAE0045E2A1 /* Info-macOS.plist */,
 			);
 			path = macOS;
 			sourceTree = "<group>";
@@ -159,6 +131,8 @@
 		83BBE9E320EB46B800295997 /* Frameworks */ = {
 			isa = PBXGroup;
 			children = (
+				8309BDC5253CCCFE0045E2A1 /* AppKit.framework */,
+				8309BD8E253CCAAA0045E2A1 /* UIKit.framework */,
 				83BBE9EE20EB471C00295997 /* ModelIO.framework */,
 				83BBE9EB20EB471700295997 /* Metal.framework */,
 				83BBE9EA20EB471700295997 /* MetalKit.framework */,
@@ -172,6 +146,8 @@
 		83BBE9F020EB544400295997 /* imgui */ = {
 			isa = PBXGroup;
 			children = (
+				8309BDB5253CCC9D0045E2A1 /* imgui_impl_metal.mm */,
+				8309BDB6253CCC9D0045E2A1 /* imgui_impl_osx.mm */,
 				83BBEA0420EB54E700295997 /* imconfig.h */,
 				83BBEA0320EB54E700295997 /* imgui.cpp */,
 				83BBEA0020EB54E700295997 /* imgui.h */,
@@ -226,7 +202,7 @@
 		8307E7B620E9F9C700473790 /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 0940;
+				LastUpgradeCheck = 1200;
 				ORGANIZATIONNAME = "Warren Moore";
 				TargetAttributes = {
 					8307E7C320E9F9C900473790 = {
@@ -263,9 +239,7 @@
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				836D2A3220EE4A900098E909 /* Launch Screen.storyboard in Resources */,
+				8309BDFC253CDAB30045E2A1 /* LaunchScreen.storyboard in Resources */,
-				8307E7CF20E9F9C900473790 /* Main.storyboard in Resources */,
-				836D2A3020EE4A180098E909 /* Default-568h@2x.png in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -273,7 +247,7 @@
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				8307E7E420E9F9C900473790 /* Main.storyboard in Resources */,
+				8309BE04253CDAB60045E2A1 /* MainMenu.storyboard in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -284,15 +258,12 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				8307E7E820E9F9C900473790 /* Renderer.mm in Sources */,
+				8309BDBB253CCCAD0045E2A1 /* imgui_impl_metal.mm in Sources */,
-				8307E7CC20E9F9C900473790 /* ViewController.mm in Sources */,
 				83BBEA0520EB54E700295997 /* imgui_draw.cpp in Sources */,
-				83BBE9DF20EB40AE00295997 /* AppDelegate.m in Sources */,
 				83BBEA0920EB54E700295997 /* imgui.cpp in Sources */,
 				83BBEA0720EB54E700295997 /* imgui_demo.cpp in Sources */,
-				83BBE9FE20EB54D800295997 /* imgui_impl_metal.mm in Sources */,
 				07A82ED82139413D0078D120 /* imgui_widgets.cpp in Sources */,
-				83BBE9DE20EB3FFC00295997 /* main.m in Sources */,
+				8309BDA5253CCC070045E2A1 /* main.mm in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -300,40 +271,18 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				83BBE9E020EB42D000295997 /* ViewController.mm in Sources */,
+				8309BDBE253CCCB60045E2A1 /* imgui_impl_metal.mm in Sources */,
-				8307E7E920E9F9C900473790 /* Renderer.mm in Sources */,
+				8309BDBF253CCCB60045E2A1 /* imgui_impl_osx.mm in Sources */,
 				83BBEA0620EB54E700295997 /* imgui_draw.cpp in Sources */,
 				07A82ED92139418F0078D120 /* imgui_widgets.cpp in Sources */,
-				8307E7E720E9F9C900473790 /* main.m in Sources */,
 				83BBEA0A20EB54E700295997 /* imgui.cpp in Sources */,
 				83BBEA0820EB54E700295997 /* imgui_demo.cpp in Sources */,
-				83BBE9FF20EB54D800295997 /* imgui_impl_metal.mm in Sources */,
+				8309BDA8253CCC080045E2A1 /* main.mm in Sources */,
-				836D2A2E20EE208E0098E909 /* imgui_impl_osx.mm in Sources */,
-				8307E7DE20E9F9C900473790 /* AppDelegate.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
 /* End PBXSourcesBuildPhase section */
 
-/* Begin PBXVariantGroup section */
-		8307E7CD20E9F9C900473790 /* Main.storyboard */ = {
-			isa = PBXVariantGroup;
-			children = (
-				8307E7CE20E9F9C900473790 /* Base */,
-			);
-			name = Main.storyboard;
-			sourceTree = "<group>";
-		};
-		8307E7E220E9F9C900473790 /* Main.storyboard */ = {
-			isa = PBXVariantGroup;
-			children = (
-				8307E7E320E9F9C900473790 /* Base */,
-			);
-			name = Main.storyboard;
-			sourceTree = "<group>";
-		};
-/* End PBXVariantGroup section */
-
 /* Begin XCBuildConfiguration section */
 		8307E7EE20E9F9C900473790 /* Debug */ = {
 			isa = XCBuildConfiguration;
@@ -361,6 +310,7 @@
 				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = YES;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
 				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
@@ -416,6 +366,7 @@
 				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = YES;
 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
 				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
@@ -451,6 +402,7 @@
 				PRODUCT_NAME = example_apple_metal;
 				SDKROOT = iphoneos;
 				TARGETED_DEVICE_FAMILY = "1,2";
+				USER_HEADER_SEARCH_PATHS = "$(SRCROOT)/../../**";
 			};
 			name = Debug;
 		};
@@ -467,6 +419,7 @@
 				PRODUCT_NAME = example_apple_metal;
 				SDKROOT = iphoneos;
 				TARGETED_DEVICE_FAMILY = "1,2";
+				USER_HEADER_SEARCH_PATHS = "$(SRCROOT)/../../**";
 				VALIDATE_PRODUCT = YES;
 			};
 			name = Release;
@@ -484,6 +437,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = "org.imgui.example.apple-metal-macos";
 				PRODUCT_NAME = example_apple_metal;
 				SDKROOT = macosx;
+				USER_HEADER_SEARCH_PATHS = "$(SRCROOT)/../../**";
 			};
 			name = Debug;
 		};
@@ -500,6 +454,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = "org.imgui.example.apple-metal-macos";
 				PRODUCT_NAME = example_apple_metal;
 				SDKROOT = macosx;
+				USER_HEADER_SEARCH_PATHS = "$(SRCROOT)/../../**";
 			};
 			name = Release;
 		};

examples/example_apple_metal/iOS/Base.lproj/Main.storyboard

@@ -1,28 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="14113" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="BV1-FR-VrT">
-    <device id="retina4_7" orientation="portrait">
-        <adaptation id="fullscreen"/>
-    </device>
-    <dependencies>
-        <deployment identifier="iOS"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14088"/>
-        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
-        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
-    </dependencies>
-    <scenes>
-        <!--View Controller-->
-        <scene sceneID="tXr-a1-R10">
-            <objects>
-                <viewController id="BV1-FR-VrT" customClass="ViewController" sceneMemberID="viewController">
-                    <view key="view" contentMode="scaleToFill" id="3se-qz-xqx" customClass="MTKView">
-                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
-                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
-                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
-                        <viewLayoutGuide key="safeArea" id="BKg-qs-eN0"/>
-                    </view>
-                </viewController>
-                <placeholder placeholderIdentifier="IBFirstResponder" id="SZV-WD-TEh" sceneMemberID="firstResponder"/>
-            </objects>
-        </scene>
-    </scenes>
-</document>

examples/example_apple_metal/iOS/Info-iOS.plist

@@ -22,8 +22,6 @@
 	<true/>
 	<key>UILaunchStoryboardName</key>
 	<string>LaunchScreen</string>
-	<key>UIMainStoryboardFile</key>
-	<string>Main</string>
 	<key>UIRequiredDeviceCapabilities</key>
 	<array>
 		<string>armv7</string>

examples/example_apple_metal/iOS/LaunchScreen.storyboard

@@ -1,11 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="14269.14" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="17156" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
-    <device id="retina4_7" orientation="portrait">
+    <device id="retina6_1" orientation="portrait" appearance="light"/>
-        <adaptation id="fullscreen"/>
-    </device>
     <dependencies>
         <deployment identifier="iOS"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14252.5"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="17125"/>
         <capability name="Safe area layout guides" minToolsVersion="9.0"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
@@ -15,10 +13,10 @@
             <objects>
                 <viewController id="01J-lp-oVM" sceneMemberID="viewController">
                     <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
-                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
+                        <rect key="frame" x="0.0" y="0.0" width="414" height="896"/>
                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
-                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
                         <viewLayoutGuide key="safeArea" id="Bcu-3y-fUS"/>
+                        <color key="backgroundColor" red="0.27843137254901962" green="0.36078431372549019" blue="0.50196078431372548" alpha="1" colorSpace="custom" customColorSpace="displayP3"/>
                     </view>
                 </viewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>

examples/example_apple_metal/macOS/Info-macOS.plist

@@ -22,10 +22,8 @@
 	<string>1</string>
 	<key>LSMinimumSystemVersion</key>
 	<string>$(MACOSX_DEPLOYMENT_TARGET)</string>
-	<key>NSHumanReadableCopyright</key>
-	<string>Copyright © 2018 Warren Moore. All rights reserved.</string>
 	<key>NSMainStoryboardFile</key>
-	<string>Main</string>
+	<string>MainMenu</string>
 	<key>NSPrincipalClass</key>
 	<string>NSApplication</string>
 </dict>

examples/example_apple_metal/macOS/MainMenu.storyboard

@@ -1,9 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.Cocoa.Storyboard.XIB" version="3.0" toolsVersion="14269.14" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES" initialViewController="B8D-0N-5wS">
+<document type="com.apple.InterfaceBuilder3.Cocoa.Storyboard.XIB" version="3.0" toolsVersion="17156" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES">
     <dependencies>
         <deployment identifier="macosx"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="14269.14"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="17156"/>
-        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>
     <scenes>
         <!--Application-->
@@ -16,8 +15,6 @@
                                 <modifierMask key="keyEquivalentModifierMask"/>
                                 <menu key="submenu" title="ImGui" systemMenu="apple" id="uQy-DD-JDr">
                                     <items>
-                                        <menuItem title="Preferences…" keyEquivalent="," id="BOF-NM-1cW"/>
-                                        <menuItem isSeparatorItem="YES" id="wFC-TO-SCJ"/>
                                         <menuItem title="Services" id="NMo-om-nkz">
                                             <modifierMask key="keyEquivalentModifierMask"/>
                                             <menu key="submenu" title="Services" systemMenu="services" id="hz9-B4-Xy5"/>
@@ -90,41 +87,7 @@
                 <customObject id="YLy-65-1bz" customClass="NSFontManager"/>
                 <customObject id="Ady-hI-5gd" userLabel="First Responder" customClass="NSResponder" sceneMemberID="firstResponder"/>
             </objects>
-            <point key="canvasLocation" x="75" y="0.0"/>
+            <point key="canvasLocation" x="-362" y="-38"/>
-        </scene>
-        <!--Window Controller-->
-        <scene sceneID="R2V-B0-nI4">
-            <objects>
-                <windowController id="B8D-0N-5wS" sceneMemberID="viewController">
-                    <window key="window" title="ImGui" allowsToolTipsWhenApplicationIsInactive="NO" autorecalculatesKeyViewLoop="NO" releasedWhenClosed="NO" animationBehavior="default" titleVisibility="hidden" id="IQv-IB-iLA">
-                        <windowStyleMask key="styleMask" titled="YES" closable="YES" miniaturizable="YES" resizable="YES"/>
-                        <windowPositionMask key="initialPositionMask" leftStrut="YES" rightStrut="YES" topStrut="YES" bottomStrut="YES"/>
-                        <rect key="contentRect" x="196" y="240" width="480" height="270"/>
-                        <rect key="screenRect" x="0.0" y="0.0" width="1680" height="1027"/>
-                        <connections>
-                            <outlet property="delegate" destination="B8D-0N-5wS" id="CyC-Pq-WbN"/>
-                        </connections>
-                    </window>
-                    <connections>
-                        <segue destination="XfG-lQ-9wD" kind="relationship" relationship="window.shadowedContentViewController" id="cq2-FE-JQM"/>
-                    </connections>
-                </windowController>
-                <customObject id="Oky-zY-oP4" userLabel="First Responder" customClass="NSResponder" sceneMemberID="firstResponder"/>
-            </objects>
-            <point key="canvasLocation" x="-128" y="390"/>
-        </scene>
-        <!--View Controller-->
-        <scene sceneID="hIz-AP-VOD">
-            <objects>
-                <viewController id="XfG-lQ-9wD" customClass="ViewController" sceneMemberID="viewController">
-                    <view key="view" wantsLayer="YES" id="m2S-Jp-Qdl" customClass="MTKView">
-                        <rect key="frame" x="0.0" y="0.0" width="1280" height="720"/>
-                        <autoresizingMask key="autoresizingMask"/>
-                    </view>
-                </viewController>
-                <customObject id="rPt-NT-nkU" userLabel="First Responder" customClass="NSResponder" sceneMemberID="firstResponder"/>
-            </objects>
-            <point key="canvasLocation" x="205" y="1032"/>
         </scene>
     </scenes>
 </document>

examples/example_apple_metal/main.mm

@@ -0,0 +1,378 @@
+
+#import <Foundation/Foundation.h>
+
+#if TARGET_OS_OSX
+#import <Cocoa/Cocoa.h>
+#else
+#import <UIKit/UIKit.h>
+#endif
+
+#import <Metal/Metal.h>
+#import <MetalKit/MetalKit.h>
+
+#include "imgui.h"
+#include "imgui_impl_metal.h"
+
+#if TARGET_OS_OSX
+#include "imgui_impl_osx.h"
+
+@interface ViewController : NSViewController
+@end
+#else
+@interface ViewController : UIViewController
+@end
+#endif
+
+@interface ViewController () <MTKViewDelegate>
+@property (nonatomic, readonly) MTKView *mtkView;
+@property (nonatomic, strong) id <MTLDevice> device;
+@property (nonatomic, strong) id <MTLCommandQueue> commandQueue;
+@end
+
+@implementation ViewController
+
+- (instancetype)initWithNibName:(nullable NSString *)nibNameOrNil bundle:(nullable NSBundle *)nibBundleOrNil {
+    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
+    
+    _device = MTLCreateSystemDefaultDevice();
+    _commandQueue = [_device newCommandQueue];
+
+    if (!self.device) {
+        NSLog(@"Metal is not supported");
+        abort();
+    }
+    
+    // Setup Dear ImGui context
+    // FIXME: This example doesn't have proper cleanup...
+    IMGUI_CHECKVERSION();
+    ImGui::CreateContext();
+    ImGuiIO& io = ImGui::GetIO(); (void)io;
+    //io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;     // Enable Keyboard Controls
+    //io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;      // Enable Gamepad Controls
+
+    // Setup Dear ImGui style
+    ImGui::StyleColorsDark();
+    //ImGui::StyleColorsClassic();
+
+    // Setup Renderer backend
+    ImGui_ImplMetal_Init(_device);
+
+    // Load Fonts
+    // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
+    // - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple.
+    // - If the file cannot be loaded, the function will return NULL. Please handle those errors in your application (e.g. use an assertion, or display an error and quit).
+    // - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call.
+    // - Read 'docs/FONTS.txt' for more instructions and details.
+    // - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !
+    //io.Fonts->AddFontDefault();
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 16.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f);
+    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/ProggyTiny.ttf", 10.0f);
+    //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
+    //IM_ASSERT(font != NULL);
+    
+    return self;
+}
+
+- (MTKView *)mtkView {
+    return (MTKView *)self.view;
+}
+
+- (void)loadView {
+    self.view = [[MTKView alloc] initWithFrame:CGRectMake(0, 0, 1200, 720)];
+}
+
+- (void)viewDidLoad
+{
+    [super viewDidLoad];
+
+    self.mtkView.device = self.device;
+    self.mtkView.delegate = self;
+    
+#if TARGET_OS_OSX
+    // Add a tracking area in order to receive mouse events whenever the mouse is within the bounds of our view
+    NSTrackingArea *trackingArea = [[NSTrackingArea alloc] initWithRect:NSZeroRect
+                                                                options:NSTrackingMouseMoved | NSTrackingInVisibleRect | NSTrackingActiveAlways
+                                                                  owner:self
+                                                               userInfo:nil];
+    [self.view addTrackingArea:trackingArea];
+
+    // If we want to receive key events, we either need to be in the responder chain of the key view,
+    // or else we can install a local monitor. The consequence of this heavy-handed approach is that
+    // we receive events for all controls, not just Dear ImGui widgets. If we had native controls in our
+    // window, we'd want to be much more careful than just ingesting the complete event stream, though we
+    // do make an effort to be good citizens by passing along events when Dear ImGui doesn't want to capture.
+    NSEventMask eventMask = NSEventMaskKeyDown | NSEventMaskKeyUp | NSEventMaskFlagsChanged | NSEventTypeScrollWheel;
+    [NSEvent addLocalMonitorForEventsMatchingMask:eventMask handler:^NSEvent * _Nullable(NSEvent *event) {
+        BOOL wantsCapture = ImGui_ImplOSX_HandleEvent(event, self.view);
+        if (event.type == NSEventTypeKeyDown && wantsCapture) {
+            return nil;
+        } else {
+            return event;
+        }
+
+    }];
+
+    ImGui_ImplOSX_Init();
+    
+#endif
+}
+
+#pragma mark - Interaction
+
+#if TARGET_OS_OSX
+
+- (void)mouseMoved:(NSEvent *)event {
+    ImGui_ImplOSX_HandleEvent(event, self.view);
+}
+
+- (void)mouseDown:(NSEvent *)event {
+    ImGui_ImplOSX_HandleEvent(event, self.view);
+}
+
+- (void)rightMouseDown:(NSEvent *)event {
+    ImGui_ImplOSX_HandleEvent(event, self.view);
+}
+
+- (void)otherMouseDown:(NSEvent *)event {
+    ImGui_ImplOSX_HandleEvent(event, self.view);
+}
+
+- (void)mouseUp:(NSEvent *)event {
+    ImGui_ImplOSX_HandleEvent(event, self.view);
+}
+
+- (void)rightMouseUp:(NSEvent *)event {
+    ImGui_ImplOSX_HandleEvent(event, self.view);
+}
+
+- (void)otherMouseUp:(NSEvent *)event {
+    ImGui_ImplOSX_HandleEvent(event, self.view);
+}
+
+- (void)mouseDragged:(NSEvent *)event {
+    ImGui_ImplOSX_HandleEvent(event, self.view);
+}
+
+- (void)rightMouseDragged:(NSEvent *)event {
+    ImGui_ImplOSX_HandleEvent(event, self.view);
+}
+
+- (void)otherMouseDragged:(NSEvent *)event {
+    ImGui_ImplOSX_HandleEvent(event, self.view);
+}
+
+- (void)scrollWheel:(NSEvent *)event {
+    ImGui_ImplOSX_HandleEvent(event, self.view);
+}
+
+#else
+
+// This touch mapping is super cheesy/hacky. We treat any touch on the screen
+// as if it were a depressed left mouse button, and we don't bother handling
+// multitouch correctly at all. This causes the "cursor" to behave very erratically
+// when there are multiple active touches. But for demo purposes, single-touch
+// interaction actually works surprisingly well.
+- (void)updateIOWithTouchEvent:(UIEvent *)event {
+    UITouch *anyTouch = event.allTouches.anyObject;
+    CGPoint touchLocation = [anyTouch locationInView:self.view];
+    ImGuiIO &io = ImGui::GetIO();
+    io.MousePos = ImVec2(touchLocation.x, touchLocation.y);
+
+    BOOL hasActiveTouch = NO;
+    for (UITouch *touch in event.allTouches) {
+        if (touch.phase != UITouchPhaseEnded && touch.phase != UITouchPhaseCancelled) {
+            hasActiveTouch = YES;
+            break;
+        }
+    }
+    io.MouseDown[0] = hasActiveTouch;
+}
+
+- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
+    [self updateIOWithTouchEvent:event];
+}
+
+- (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
+    [self updateIOWithTouchEvent:event];
+}
+
+- (void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
+    [self updateIOWithTouchEvent:event];
+}
+
+- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
+    [self updateIOWithTouchEvent:event];
+}
+
+#endif
+
+#pragma mark - MTKViewDelegate
+
+- (void)drawInMTKView:(MTKView*)view
+{
+    ImGuiIO &io = ImGui::GetIO();
+    io.DisplaySize.x = view.bounds.size.width;
+    io.DisplaySize.y = view.bounds.size.height;
+
+#if TARGET_OS_OSX
+    CGFloat framebufferScale = view.window.screen.backingScaleFactor ?: NSScreen.mainScreen.backingScaleFactor;
+#else
+    CGFloat framebufferScale = view.window.screen.scale ?: UIScreen.mainScreen.scale;
+#endif
+    io.DisplayFramebufferScale = ImVec2(framebufferScale, framebufferScale);
+
+    io.DeltaTime = 1 / float(view.preferredFramesPerSecond ?: 60);
+
+    id<MTLCommandBuffer> commandBuffer = [self.commandQueue commandBuffer];
+
+    // Our state (make them static = more or less global) as a convenience to keep the example terse.
+    static bool show_demo_window = true;
+    static bool show_another_window = false;
+    static float clear_color[4] = { 0.28f, 0.36f, 0.5f, 1.0f };
+
+    MTLRenderPassDescriptor* renderPassDescriptor = view.currentRenderPassDescriptor;
+    if (renderPassDescriptor != nil)
+    {
+        renderPassDescriptor.colorAttachments[0].clearColor = MTLClearColorMake(clear_color[0], clear_color[1], clear_color[2], clear_color[3]);
+
+        // Here, you could do additional rendering work, including other passes as necessary.
+
+        id <MTLRenderCommandEncoder> renderEncoder = [commandBuffer renderCommandEncoderWithDescriptor:renderPassDescriptor];
+        [renderEncoder pushDebugGroup:@"ImGui demo"];
+
+        // Start the Dear ImGui frame
+        ImGui_ImplMetal_NewFrame(renderPassDescriptor);
+#if TARGET_OS_OSX
+        ImGui_ImplOSX_NewFrame(view);
+#endif
+        ImGui::NewFrame();
+
+        // 1. Show the big demo window (Most of the sample code is in ImGui::ShowDemoWindow()! You can browse its code to learn more about Dear ImGui!).
+        if (show_demo_window)
+            ImGui::ShowDemoWindow(&show_demo_window);
+
+        // 2. Show a simple window that we create ourselves. We use a Begin/End pair to created a named window.
+        {
+            static float f = 0.0f;
+            static int counter = 0;
+
+            ImGui::Begin("Hello, world!");                          // Create a window called "Hello, world!" and append into it.
+
+            ImGui::Text("This is some useful text.");               // Display some text (you can use a format strings too)
+            ImGui::Checkbox("Demo Window", &show_demo_window);      // Edit bools storing our window open/close state
+            ImGui::Checkbox("Another Window", &show_another_window);
+
+            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float using a slider from 0.0f to 1.0f
+            ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color
+
+            if (ImGui::Button("Button"))                            // Buttons return true when clicked (most widgets return true when edited/activated)
+                counter++;
+            ImGui::SameLine();
+            ImGui::Text("counter = %d", counter);
+
+            ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
+            ImGui::End();
+        }
+
+        // 3. Show another simple window.
+        if (show_another_window)
+        {
+            ImGui::Begin("Another Window", &show_another_window);   // Pass a pointer to our bool variable (the window will have a closing button that will clear the bool when clicked)
+            ImGui::Text("Hello from another window!");
+            if (ImGui::Button("Close Me"))
+                show_another_window = false;
+            ImGui::End();
+        }
+
+        // Rendering
+        ImGui::Render();
+        ImDrawData* drawData = ImGui::GetDrawData();
+        ImGui_ImplMetal_RenderDrawData(drawData, commandBuffer, renderEncoder);
+
+        [renderEncoder popDebugGroup];
+        [renderEncoder endEncoding];
+
+        [commandBuffer presentDrawable:view.currentDrawable];
+    }
+
+    [commandBuffer commit];
+}
+
+- (void)mtkView:(MTKView*)view drawableSizeWillChange:(CGSize)size
+{
+}
+
+@end
+
+#pragma mark - Application Delegate
+
+#if TARGET_OS_OSX
+
+@interface AppDelegate : NSObject <NSApplicationDelegate>
+@property (nonatomic, strong) NSWindow *window;
+@end
+
+@implementation AppDelegate
+
+- (instancetype)init {
+    if (self = [super init]) {
+        NSViewController *rootViewController = [[ViewController alloc] initWithNibName:nil bundle:nil];
+        self.window = [[NSWindow alloc] initWithContentRect:NSZeroRect
+                                                  styleMask:NSWindowStyleMaskTitled | NSWindowStyleMaskClosable | NSWindowStyleMaskResizable | NSWindowStyleMaskMiniaturizable
+                                                    backing:NSBackingStoreBuffered
+                                                      defer:NO];
+        self.window.contentViewController = rootViewController;
+        [self.window orderFront:self];
+        [self.window center];
+        [self.window becomeKeyWindow];
+    }
+    return self;
+}
+
+- (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)sender {
+    return YES;
+}
+
+@end
+
+#else
+
+@interface AppDelegate : UIResponder <UIApplicationDelegate>
+@property (strong, nonatomic) UIWindow *window;
+@end
+
+@implementation AppDelegate
+
+- (BOOL)application:(UIApplication *)application
+    didFinishLaunchingWithOptions:(NSDictionary<UIApplicationLaunchOptionsKey,id> *)launchOptions
+{
+    UIViewController *rootViewController = [[ViewController alloc] init];
+    self.window = [[UIWindow alloc] initWithFrame:UIScreen.mainScreen.bounds];
+    self.window.rootViewController = rootViewController;
+    [self.window makeKeyAndVisible];
+    return YES;
+}
+
+@end
+
+#endif
+
+#pragma mark - main()
+
+#if TARGET_OS_OSX
+
+int main(int argc, const char * argv[]) {
+    return NSApplicationMain(argc, argv);
+}
+
+#else
+
+int main(int argc, char * argv[]) {
+    @autoreleasepool {
+        return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
+    }
+}
+
+#endif